fix: translation inconsistencies

[fsbraun]

Description

This PR standardizes the short name of a Version object to allow for consistent translation especially in the toolbar menu.

Related resources

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Checklist

• [x] I have opened this pull request against master
• [x] I have added or modified the tests when changing logic
• [x ] I have followed the conventional commits guidelines to add meaningful information into the changelog
• [x] I have read the contribution guidelines and I have joined #workgroup-pr-review on Slack to find a “pr review buddy” who is going to review my pull request.

[codecov[bot]]

Codecov Report

Merging #313 (b1fd19b) into master (9e1183a) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #313   +/-   ##
=======================================
  Coverage   89.87%   89.88%           
=======================================
  Files          68       68           
  Lines        2242     2244    +2     
  Branches      299      299           
=======================================
+ Hits         2015     2017    +2     
  Misses        172      172           
  Partials       55       55           

Impacted Files	Coverage Δ
djangocms_versioning/cms_toolbars.py	95.70% <100.00%> (ø)
djangocms_versioning/models.py	94.91% <100.00%> (+0.05%)	:arrow_up:

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